Awl mechanism for shoe-sewing machines.



8, R GARLETON Patented Iuly I6, 1901.

AWL MECHANISM FOR SHOE SEWING MACHINES.

(N M d I 3 (Application filed Mar. 5, 1901.)

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B. CARLETDN.

AWL MECHANISM FOR SHOE SEWING MACHINES.

(Application filed Mar. 5, 1901.) (No Model.) 3 Sheeis-$heet 2.

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No. 678,539. Patented luly l6, l90l.

R. BARLETUN. AWL MECHANISM FOR SHOE SEWING MACHINES.

(Application filed Mar. 5, 1901.) (No Model.) 3 Sheets-Sheet 3.

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ROSWELL CARLETO N, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CHARLES F. BROWN, TRUSTEE, OF READING, MASSACHUSETTS.

AWL. MECHANISM FOR SHOE-SEW!NG MACHINES.

SPECIFICATION forming part of Letters Patent No. 678,539, dated July 16, 1901. Application filed March 5,1901. Serial No. 49,919. (No model.

To ttZZ whom 212? may concern:

Be it known that I, ROSWELL CARLETONQ of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new curing the upper to the sole of a boot or shoe byloops from a single thread inserted through the upper and through the portion of the sole usually known as the between substance, the bights of the loops being thrown over and locked by tongues out in one side of the sole.

The tongues are formed by a cutting-tool, which makes an inclined V-shaped incision in the face of the sole, thus forming a tapering V-shaped tongue, which is integral with the solo. The bottom of the incision formed in making the tongue forms a trough or recess, the inner end of which is separated from the edge of the sole by the portion which in a channeled sole is known as the between substance. Attemptshavebeeu made tosew shoes in this way by machines organized to cut the tongues, as well as to form the loops and engage them with the tongues. It has been found impracticable, however, to successfully operate machines thus organized,

o owing to the necessary complication of. the

mechanism and the diiiiculty of properly entering the awl and needle into the recesses under the tongues to locate the loop so that it will properly engage the tongues, the awl 5 being required to perforate the between substance for the reception of the loop, which is forced through'the upper and the between substance by the needle and then engaged with the tongue. Moreover, it has not here- 0 tofore been found practicable to cut the tongues in the sole by a separate machine before the sewing operation, because of the above-mentioned difficulty of causing the awl and needle of the sewing mechanism to prop- 5 erly register with the recesses under the tongues.

My invention has for its object to provide a machine of this character adapted to connect the upper and sole when the sole has been previously provided with tongues, the

machine being organized to form the loopreceiving orifices through the between substance centrally under the bases of the tongues, so that the loops will be located in the proper position to be locked by the tongues.

The invention consists in the improvements hereinafter described and claimed, said improvements including an awl, which is adapted to wabble laterally when entering the re- A part of this specification, Figure 1 represents a front elevation of a sewing-machine embodying myinvention. Fig. 2 represents an end elevation of parts of the machine, other parts being removed. Fig. 3 represents a side elevation showing parts of the machine, the needle being advanced and the awl retracted. Fig. 4 represents a front elevation showing the parts represented in Fig. 3. Fig. 5 represents a view similar to Fig. 3, showing the awl advanced and the needle retracted. Fig. 6 represents a front elevation showing the parts as represented in Fig. 5. Fig. 7 represents a front view of the awl-guiding arm, showing yielding guides thereon. Fig.

'8 represents a side view of the loop'controller,

showinga yielding thread-grasping jaw thereon. Fig. 9 represents a perspective View of a portion of an upper and sole as connected go by interlocked tongues and loops. Fig. 10 represents a section on line 1O 10 of Fig. 1.

Referring to Fig. 9 and to Figs. 3 to 6, inclusive, a represents a sole; b, an upper; o o, tongues out in the outer face of the sole, and d d the loops which pass through the upper and the between substance and are interlocked with the tongues. The tongues are formed before the sole and upper are assembled, each tongue being formed by forcing ice a V-shaped chisel or cutting-tool into the up per surface of the sole in adirection which is inclined relatively to the said surface, so that the tongue is pointed or 'V-shaped.

1 represents the curved needle, the hook or barb of which is formed to push a loop of thread through the upper and between substance, the thread-engaging side 100 of the notch which forms the hook being formed to face the point of the needle, as shown in Fig. 5. The needle is attached to the needleblock 2, which is pivoted at 3 to a fixed supporting-arm 4 on the frame of the machine. The needle-block is oscillated to oscillate the needle by means of a cam-groove 5, Fig. 2, in a disk on the driving-shaft 6, a lever composed of two arms 7 and 70, and a sleeve 8, to which said arms are rigidly attached, said sleeve being mounted to oscillate in a fixed bearing 9, a trundle-roll 90 on thelever-arm entering the cam-groove 5 and a link 10 connecting the lever-arm 7 with the needle-block 2. The needle has no side movement, the feeding of the work being effected by the awl, as hereinafter described.

12 represents the awl, attached to the awlcarrier 13, which is pivoted at L1 to the awlcarriage, which moves the carrier and awl laterally to cause the awl to feed the work. Said carriage, as here shown, is composed of an arm 15, formed on a hub 16, and a cylindrical slide 17, to which said hub is affixed, said slide being movable endwise in fixed bearings on the machine-frame and prevented from turning in said bearings, as hereinafter described. One of the hearings in which the slide 17 is supported is shown at 18, Fig. l, the other being the sleeve 8, above described, the interior of which is formed to receive one end of the slide 17. The carriage is moved endwise to give the awl its workfeeding and return movements by means of a cam-groove 20 in a disk on the drivingshaft 6, a lever 21, pivoted at 22 to the frame of the machine and having a trundle-roll (not shown) which enters the cam-groove 20, and an arm 24, affixed to the slide 17 and connected with the lever 21 by a stud 26, attached to the lever 21 and passing through a slot 25 in the arm 24, said stud being provided with a thumb-nut 27. The rotation of the driving-shaft causes the cam-groove 20 to oscillate the lever 21, which imparts an end.- wise-reciprocating movement to the slide 17 through the cam 24. The length of the feed movement may be varied by adjusting the stud 26 in the slot 25. The slide is prevented from rotating in its bearings bya stud 29 on an arm 28, affixed to the shaft 16 and a guide for said stud in the supporting-frame, the pin sliding endwise in its guide.

The awl-carrier and awl are reciprocated by a cam-groove (not shown) in a disk 31 on the driving-shaft, a lever 32, pivoted on the slide 17 and having at one end a trundle-roll 33 engaged with the said cam-groove, and a link 34, Fig. 2, connecting the lower end of the lever 32 with the awl-carrier.

The awl-carrier is composed of the body portion 13 and an outer section 130, to which the awl is attached. Said outer section is pivoted to the body portion 13 by a stud 131, on which the section 130 is adapted to oscillate crosswise of the path of the awl to permit thepoint of the awl to wabble laterally, and thus automatically find the center of the recesses under the locking-tongues on the sole, this wabbling movement of the awl being permitted while the awl is descending and until it has reached the inner end of the recess under a tongue, the awl being guided while loose by the sides of the recess, which. is V- shaped, or approximately so, in cross-section, so that when the awl reaches the between substance it is under the center of the tongue. Means are provided for preventing the webbling movement of the awl while it is penetrating the between substance and for guid ing it in a predetermined path, which path coincides with the path of the needle after the awl has been moved to feed the work.

The means here shown for permitting the awl to wabble during the first part of its forward movement and preventing the wabbling movement during the latter part include an arm 36, which is affixed by screws 37 37 to the awl-carriage 15. The lower portion of said arm is curved and has a slot 38, into which projects a trundle-roll 39 on a stud affixed to the pivoted section 130 and located above the pivot-stud 131. The slot 38 has two inclined shoulders 40 40 about midway between its ends. The part of the slot above said shoulders is wider than the part below the same, the width of the upper part being considerably greater than the diameter of the roll 39, so that the sect-ion 130 of the awl-block is free to oscillate on the stud 131 when the roll is in the upper part of the slot, thus permitting the awl to oscillate or wabble laterally-while it is entering the recess under a tongue. The narrower part of the slot below said shoulders is formed to confine the roll 39 against lateral movement, so that during the latter part of the advancing movement of the awl and while it is penetrating the between substance it is confined against lateral movement and is guided in a fixed path, which at the end of the feed movement of the awl is in line with the path of the'needle. The awl therefore forms a hole through the between substance directly under the center of the tongue, so that the loop is inserted in position to properly engage the tongue. In Fig. 7 I show yielding guides 380, attached to the arm 36 and composed, preferably, of resilient wire springs, which extend in line with the sides of the narrower portion of the slot 38 over the wider portion of the slot, said guides forming yielding extensions of the sides of the narrower portion of the slot, which bear on the trundle-roll or projection 39 and normally hold it centrally in the wider portion of the slot, but permit it to deviate from a central position as may be required to enable the awl to find the center of the recess under a tongue.

IIO

It will be seen that the sides of the wider part of the slot 38 are arranged to permit the awl to move laterally during the first part of its forward movementin either direction from the path in which it is subsequently guided by the narrower part of said slot. Hence the awl can be deflected either to the right or to the left from the line of said path during the first part of its forward movement.

41 represents an edge gage or rest,which is located above the usual back-rest 42 and is movable toward and from the work and bears on the upper, as shown in Fig. 3, to coopererate with the back-rest in supporting the work while the awl is penetrating the between substance. The edge gage is operated by a cam 43, Fig. 2, on the driving-shaft and a lever 44, pivoted at 45 to the frame and having a trundle-roll 46, which is pressed by a spring 47 against the cam. Said lever bears against a stud 48 on a slide 49, which supports the gage 41, and is movable in fixed guides on the frame. The spring 47 is attached at one end to the slide 49 and holds the stud 48 against the lever44 and the lever against the cam 43.

The back-rest 42 is attached to a slide 51, which moves in fixed guides on the frame and has a ratchet 52. Aspring 53 normally forces the slide 51 and rest 42 toward the work. dog 54, pivoted at 55 and controlled by the spring 47 and a cam 56, engages the ratchet 52 and alternately locks and releases the slide 51 by engaging and releasing the ratchet The spring 47 is connected at one end with the dog 54 and holds its upper end against the cam 56.

57 is a loop-controller, which enters the loop pushed through the between substance by the needle, holds the loop while the needle is retreating, and releases the loop after moving its bight to position above the tongue, so that when the loop is taken up it will lie across the tongue, as shown in Fig. 9. The loop-controller is a finger formed on a lever 58, which is pivoted to a fixed ear 59, Fig. 1, on the frame. Said lever is connected by a stud 60 with the lower end of a lever 6.1,which is pivoted to a fixed arm 62, Fig. 1, on the frame and has at its upperend a trundle roll 63, which is held by a spring 64 against the periphery of a disk on the driving-shaft, said disk having a cam 65, Fig. 1, which cooperates with the spring 64 in oscillating the lever 61 and the loop-controller. This mechanism holds the loop-controller alternately in the two positions shown, respectively, by full and dotted lines in Fig. 3. The object of the two levers 58 and 61 is to enable the movements of the controller to be adjusted, the stud 60, connecting said levers, being adjustable in slots in the levers. The acting por= tion of the controller is hook-shaped, as shown in Fig. 8, its sides converging inwardly toward its lower end, which has a notch 66, Fig. 1,which gives the controller a bifurcated form, thus enabling it to bestride the needle, as shown byfull lines in Figs. 3 and 4. When the controller moves to the position shown in full lines in Fig. 3, its pointed bifurcations enter the loop at opposite sides of the needle. Said fin gers are preferably provided with loopgrasping springs 67, Fig. 8, which bear on the outer side of the thread and hold the thread on the controller while the latter is moving back to the dotted-line position, thus preventing the loop from slipping otf from the controller until after the latter has raised the bight of the loop to a point above the base of the looking-tongue and insuring the proper engagement of the loop with the tongue.

68, Fig. 2, is the take-up lever, which is pivoted at 69 to the frame and has a threadroll 700 at its lower end. The upper end of the lever 68 has a trundle-roll 71, which is held by a spring "2 against a cam 73 on the drivingshaft. The thread passes from the wax-pot around a tension-roll 74, mounted on the frame, and from thence over a roll 75 to the roll 700, from which it passes through the looper next described.

76 represents the looper-arm, having a thread-guiding eye 77 adjacent to the needle. The arm 76 is atlixed to a rock-shaft 78, journaled in bearings on the frame and having an arm 79, on the upper end of which is a trundle-roll 80, held by a spring 81 against one side of the disk Said disk has a cam 83, Fig. 1, which imparts movement to the arm 79 once during each rotation of the shaft and cooperates with the spring 81 in oscillating the looper, which is thus caused to press the thread. downwardly on the upper side of the needle at the proper time to cause the hook of the needle to engage the thread when the needle is advancing.

85 represents a pointed dog, which is arranged to move toward and from the upper surface of the sole at a point near the awl, said dog entering the sole and holdingit from sidewise and endwise movement, the dog pre venting the needle from pushing the work .outwardly when it is entering the between substance. The dog 85 is formed on a lever 86, which is pivoted at 87 to the arm 15 of the awl-carriage, and has a trundle-roll 88 at its upper end,which is held by a spring 89 against the perimeter of the disk 31, said disk having a cam 900, Fig. 1, which cooperates with the spring 89 in oscillating the lever 86 and swinging the dog toward and from the upper .face of the sole. This dog takes the place of the ordinary channel guide or gage in a machine organized to sew a shoe having a channeled sole; but as in this case the sole has no chan nel the dog is formed to penetrate the sole to hold it and. to reeede from the sole to permit the feed movement.

Operation: The needle and awl being both retracted, the awl is advanced from the position shown in Figs. 3 and 4 toward the sole, the section of the awl-bloek being loose,

I moving backwardly at the same time.

so that the point of the awl is free to wabble and find the center of the recess under a locking-tongue. \Vhen the awl has advanced so that its point reaches the between substance, it is prevented from wabbling by the narrower part of the slot 38 during the remainder of its forward movement. After the awl has penetrated the Work the awl-carriage is moved toward the left as the machine is viewed in Fig. 1 until the awl is in the path of the needle and has fed the work. The needle then advances toward the work, and at the same time the looper moves to press ,the thread downwardly on the upper side of the needle, so that the advancing hook of the needle engages the thread and pushes a loop of thread through the hole made by the awl, the latter While the needle is advancing the edge gage 41 moves forward against the upper and remains there while the needle is advancing and retreating and While the awl is entering the work. After the awl has withdrawn from the work the carriage is moved to the right, returning the awl to its starting position, the dog 85 being raised during this movement of the carriage. After the needle has completed its forward movement it partly recedes to loosen the loop from the barb and then stops with the barb above the sole. The loop-controller then moves from the position shown by dotted lines to that shown in full lines in Fig.

3 and enters the loop. The needle then retreats to its starting position. The take-up then draws the thread and tightens it on the loop-controller,which then moves backwardly to the position shown in dotted lines and releases the loop, which is then drawn across the tongue by the take-up. The dog 85 descends and engages the sole after the work has been fed and remainsin engagement therewith until the return movement of the feedcarriage. After the return movement the dog is again engaged with the work until the awl advances to penetrate the between substance, when the dog is again raised from the work, so that the work is free to be moved. with the awl when the latter is brought to its predetermined path by the narrower portion of the slot 38 in case the awl in finding the center of the recess under a tongue has been deflected to one side or the other'of said path. It is obvious that the described machine may be used for connecting the welt, upper, and sole of a welted shoe, a suitable welt-guide being provided.

Having thus explained the nature of my invention and described a Way of constructing and using the same, although without having attempted to set forth all the forms in which it may be embodied or all the modes of its use, I declare that what I claim is- 1. A sewing-machine of the character specified, comprising a curved work-penetrating device, a carrier therefor on which the penetrating device has a loose wabbling movement, and means for preventing the wabbling movement of the penetrating device during the latter portion of its forward movement to guide the device in a predetermined path, the said device being free during the first or work-finding portion of its forward movement to move laterallyin either direction from the said path.

2. A sewing-inachine of the character specified, comprising a work-penetrating device, a carrier therefor having a pivoted section to which the said device is attached, said section having a projection at one side of its pivot, and a guide-arm having a slot which engages said projection and prevents the pivoted section from turning during a part of the forward movement of the penetrating device.

3. A sewing-machine of the character specified, comprising a work-penetrating device, a carrier therefor having a pivoted section to which the penetrating device is attached, said section having a projection at one side of its pivot, and a guide-arm having a slot which engages said projection and prevents the pivoted section from turning during a part of the forward movement of the penetrating device, said arm having yielding guides adapted to yieldingly guide the said projection while the penetrating device is free to wabble.

In testimony whereof I have affixed my signature in presence of two witnesses.

ROSWELL OARLETON.

Witnesses:

C. F. BROWN, A. D. HARRISON. 

